s1_goto_dir(){
cd "$1"
}
s2_touch_empty_file_with_given_name(){
touch "$1"
}
s3_make_directories(){
mkdir -p projects/git projects/backup
}
s4_create_6_files(){
(cd projects && touch linux1_centos linux1_redhat linux1_c_programming linux2_centos linux2_redhat linux_c_programming)
}
s5_make_directories_in_git(){
	mkdir -p projects/git/linux1 projects/git/linux2
}
s6_move_files_to_dir_1_or_2(){
mv projects/linux1_* projects/git/linux1/
mv projects/linux2_* projects/git/linux2/

}
s7_create_package_and_compress(){
	tar -czvf projects/backup/git.tar.gz -C projects git
}

s8_delete_dir_git(){
rm -rf projects/git
}

s9_recover_from_git_tar_gz_backup(){
	tar -zxvf projects/backup/git.tar.gz -C projects
}
s10_create_package_and_compress(){
	
tar -jcvf projects/backup/git.tar.bz2 -C projects git
}
s11_find_and_sort_alphabetically_all_created_files_and_dirs(){
	find ./projects -print0 | sort -z | xargs -0 echo
}

s12_get_next_15_minutes_boundary(){
	now=$(date +%s)
	next_15_min=$(((expr$now / 900+1) \*900))
	date -d @$next_15_min +%Y-%m-%d %H:%M:%S
}




